diff --git a/planner/core/logical_plan_builder.go b/planner/core/logical_plan_builder.go
index 0fa7275203..9c57451434 100644
--- a/planner/core/logical_plan_builder.go
+++ b/planner/core/logical_plan_builder.go
@@ -2704,7 +2704,7 @@ func (b *PlanBuilder) buildDataSource(ctx context.Context, tn *ast.TableName, as
 	var indexMergeHints []*ast.IndexHint
 	if hints := b.TableHints(); hints != nil {
 		for i, hint := range hints.indexMergeHintList {
-			if hint.tblName.L == tblName.L {
+			if hint.tblName.L == tblName.L && hint.dbName.L == dbName.L {
 				hints.indexMergeHintList[i].matched = true
 				// check whether the index names in IndexMergeHint are valid.
 				invalidIdxNames := make([]string, 0, len(hint.indexHint.IndexNames))
diff --git a/planner/core/testdata/plan_suite_in.json b/planner/core/testdata/plan_suite_in.json
index 403d75cf33..31dab48fa1 100644
--- a/planner/core/testdata/plan_suite_in.json
+++ b/planner/core/testdata/plan_suite_in.json
@@ -60,7 +60,9 @@
       "select /*+ NO_INDEX_MERGE(), USE_INDEX_MERGE(t, primary, f_g, c_d_e) */ * from t where a < 1 or f > 2",
       "select /*+ USE_INDEX_MERGE(t1, c_d_e, f_g) */ * from t where c < 1 or f > 2",
       "select /*+ NO_INDEX_MERGE(), USE_INDEX_MERGE(t, primary, f_g, c_d_e) */ * from t where a < 1 or f > 2",
-      "select /*+ USE_INDEX_MERGE(t) USE_INDEX_MERGE(t) */ * from t where c < 1 or f > 2"
+      "select /*+ USE_INDEX_MERGE(t) USE_INDEX_MERGE(t) */ * from t where c < 1 or f > 2",
+      "select /*+ USE_INDEX_MERGE(db2.t) */ * from t where c < 1 or f > 2",
+      "select /*+ USE_INDEX_MERGE(db2.t, c_d_e, f_g) */ * from t where c < 1 or f > 2"
     ]
   },
   {
diff --git a/planner/core/testdata/plan_suite_out.json b/planner/core/testdata/plan_suite_out.json
index 2207c84c06..652c55f7a5 100644
--- a/planner/core/testdata/plan_suite_out.json
+++ b/planner/core/testdata/plan_suite_out.json
@@ -229,6 +229,18 @@
         "Best": "IndexMergeReader(PartialPlans->[Index(t.c_d_e)[[-inf,1)], Index(t.f_g)[(2,+inf]]], TablePlan->Table(t))",
         "HasWarn": false,
         "Hints": "use_index_merge(@`sel_1` `t` `c_d_e`, `f_g`)"
+      },
+      {
+        "SQL": "select /*+ USE_INDEX_MERGE(db2.t) */ * from t where c < 1 or f > 2",
+        "Best": "TableReader(Table(t)->Sel([or(lt(test.t.c, 1), gt(test.t.f, 2))]))",
+        "HasWarn": true,
+        "Hints": "use_index(@`sel_1` `test`.`t` )"
+      },
+      {
+        "SQL": "select /*+ USE_INDEX_MERGE(db2.t, c_d_e, f_g) */ * from t where c < 1 or f > 2",
+        "Best": "TableReader(Table(t)->Sel([or(lt(test.t.c, 1), gt(test.t.f, 2))]))",
+        "HasWarn": true,
+        "Hints": "use_index(@`sel_1` `test`.`t` )"
       }
     ]
   },